| Acronym | Meaning |
| ABR | Anaerobic Baffled Reactor (for Wastewater Treatment) |
| ESP | Elimination Of Solvation Procedure |
| CIP | Configuration Interaction With Partner Orbitals |
| RAF | Reactivity Adjustment Factor |
| CPD | Cyclobutane Pyrimidine Dimer |
| HVA | Homovanillic Acid |
| PORG | Photochemical Oxidants Review Group |
| POA | Preoptic Area |
| CINC | Cytokine-induced Neutrophil Chemoattractant |
| NMIJ | National Metrology Institute Of Japan |